您要查找的是不是：
- Some stars are invisible to the naked eye. 有些星体肉眼是看不见的。
- He remains invisible when out of spirits. 闷闷不乐时，他不露面。
- invisible deterioration 无形变质
- Germs are invisible to the naked eye. 细菌用肉眼看不见。
- The gun can fire invisible rays. 这枪能发出看不见的射线。
- The mends were almost invisible. 修补过的地方几乎看不出来。
- That comet is invisible to the unaided eye. 那颗彗星只用肉眼是看不到的。
- The differences are almost invisible. 这些差别简直难以辨认。
- She was invisible in the dusk of the room. 她在昏暗的房间里别人看不到她。
- Inevitable and steady deterioration of a system or society. 恶化，败坏系统或社会不可避免的无法逆转的恶化或败坏
- Invis fade time down to 5 seconds. 隐形减至5秒。
- I definitely felt a deterioration in vigor. 我自感体力已退化了。
- The food undergoes no deterioration in the tropics. 这种食品在热带地方不会变质。
- Safeguard records from damage or deterioration. 保护以防记录损坏或变质。
- Deterioration effect of UV exposure. 紫外光曝晒下劣化效果。
- General wear and deterioration at corner fittings. 角落装置一般磨损及老化;
- A deterioration of mental faculties;senility. 衰老大脑功能的衰老；老年昏聩
- A deterioration of mental faculties; senility. 衰老大脑功能的衰老；老年昏聩
- Bacteria is something invisible to the eye. 细菌是肉眼看不见的东西。
- This sped the deterioration of health. 这加速健康日益恶化。
